The present invention relates to a DNA fragment containing a nucleotide sequence that encodes an amino acid sequence of esterase, said esterase asymmetrically hydrolyzing carboxylic acid esters represented by the formula (I);
(wherein R₁ is alkyl, aralkyl or aryl, R₂ and R₃ are alkyl, and n is 1 or 2) an esterase encoded by the DNA fragment, a recombinant plasmid containing the DNA fragment, a microorganism transformed with the recombinant plasmid and methods of producing optically active carboxylic acids and their enantiomeric esters.
本发明涉及一种含有编码
酯酶氨基酸序列的核苷酸序列的 DNA 片段,所述
酯酶可不对称地
水解式 (I) 所代表的
羧酸酯;
(其中 R₁ 是烷基、芳基或芳基,R₂ 和 R₃ 是烷基,n 是 1 或 2)由该 DNA 片段编码的
酯酶、含有该 DNA 片段的
重组质粒、用该
重组质粒转化的微
生物以及生产光学活性
羧酸及其对映体酯的方法。